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1050
| 1050 • Hedeby is sacked by King Harald Hardråde of Norway during the course of a conflict with Sweyn II of Denmark. |
1079
Age: 29y
birth of childDangereuse de L' Isle Bouchard 1 Source ⇓ |
| 1079 • Persian astronomer, Omar Khayyám, computed the length of the year to be exactly 365.24219858156 days, the most accurate calculation of his time. Khayyam also, in Treatise on Demonstrations of Problems in Algebra, produced a complete classification of cubic equations and their geometric solutions. |